On Thu, Aug 13, 2009 at 11:35 AM, Lina Rusyte<liner...@yahoo.co.uk> wrote:
Hi Lina,
> What function can I use for matrices addition? I couldn’t find any
> information about it in the manual or in the internet.
> (A+B suits, when the number of matrixes is small, function sum() doesn’t suit
> for matrices addition, because it sums all variables in the matrices and
> produces as an answer single number, not a matrix).
I don't know of any function doing that, but you could easily write a
one yourself. Suppese that X is a list of matrices. Then you could
e.g. do as follows:
matrixSum = function(X)
{
N = length(X)
if (N==2) return(X[[1]]+X[[2]])
else return(matrixSum(X[[1:(N-1)]],X[[N]]))
}
I guess that one should do the trick.
Best,
Michael
--
Michael Knudsen
micknud...@gmail.com
http://lifeofknudsen.blogspot.com/
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
